An analysis of the effects of the size ratio and fines content on the shear behaviors of binary mixtures using DEM

摘要: Abstract This study presents an investigation of the effects size ratio and fines content on macroscopic microscopic shear behaviors binary mixtures via a series numerical triaxial compression tests using discrete element method. The behaviors, including friction angles stress-dilatancy relationship, percentage contributions contact types, average normal forces, partial coordination numbers, weak/strong contacts non-sliding/sliding contacts, are examined. A detailed analysis force-fabric anisotropy whole network enables us to comprehend mechanism critical strength independent content. In addition, inspection three subnetworks reveals why types vary with Finally, geometric strong non-sliding subnetwork better explains underlying peak strengths.